package com.warski.wonderfires.view;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.widget.ProgressBar;
import com.warski.wonderfires.R;

/**
 * Created by xuhaiping on 2020/8/30.
 */
public class CustomProcessBarView extends ProgressBar {
    private static final int DEFAULT_TEXT_SIZE = 10;
    private static final int DEFAULT_TEXT_COLOR = 0XFFFC00D1;
    private static final int DEFAULT_COLOR_UNREACHED_COLOR = 0xFFd3d6da;
    private static final int DEFAULT_HEIGHT_REACHED_PROGRESS_BAR = 2;
    private static final int DEFAULT_HEIGHT_UNREACHED_PROGRESS_BAR = 2;
    private static final int DEFAULT_SIZE_TEXT_OFFSET = 10;

    protected Paint mPaint = new Paint();
    protected int mTextColor = DEFAULT_TEXT_COLOR;
    protected int mTextSize = sp2px(DEFAULT_TEXT_SIZE);
    protected int mTextOffset = dp2px(DEFAULT_SIZE_TEXT_OFFSET);
    protected int mReachedProgressBarHeight = dp2px(DEFAULT_HEIGHT_REACHED_PROGRESS_BAR);
    protected int mReachedBarColor = DEFAULT_TEXT_COLOR;
    protected int mUnReachedBarColor = DEFAULT_COLOR_UNREACHED_COLOR;
    protected int mUnReachedProgressBarHeight = dp2px(DEFAULT_HEIGHT_UNREACHED_PROGRESS_BAR);
    protected int mRealWidth;
    protected boolean mIfDrawText = true;
    protected static final int VISIBLE = 0;

    public CustomProcessBarView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CustomProcessBarView(Context context, AttributeSet attrs,
                                int defStyle) {
        super(context, attrs, defStyle);
        obtainStyledAttributes(attrs);
        mPaint.setTextSize(mTextSize);
        mPaint.setColor(mTextColor);
    }

    @Override
    protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int width = MeasureSpec.getSize(widthMeasureSpec);
        int height = measureHeight(heightMeasureSpec);
        setMeasuredDimension(width, height);

        mRealWidth = getMeasuredWidth() - getPaddingRight() - getPaddingLeft();
    }

    private int measureHeight(int measureSpec) {
        int result = 0;
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);
        if (specMode == MeasureSpec.EXACTLY) {
            result = specSize;
        } else {
            float textHeight = (mPaint.descent() - mPaint.ascent());

            result = (int) (getPaddingTop() + getPaddingBottom() + Math.max(
                    Math.max(mReachedProgressBarHeight,
                            mUnReachedProgressBarHeight), Math.abs(textHeight)));
            if (specMode == MeasureSpec.AT_MOST) {
                result = Math.min(result, specSize);
            }
        }
        return result;
    }

    private void obtainStyledAttributes(AttributeSet attrs) {
        final TypedArray attributes = getContext().obtainStyledAttributes(
                attrs, R.styleable.CustomProcessBarView);

        mTextColor = attributes
                .getColor(
                        R.styleable.CustomProcessBarView_progress_text_color,
                        DEFAULT_TEXT_COLOR);
        mTextSize = (int) attributes.getDimension(
                R.styleable.CustomProcessBarView_progress_text_size,
                mTextSize);

        mReachedBarColor = attributes
                .getColor(
                        R.styleable.CustomProcessBarView_progress_reached_color,
                        mTextColor);
        mUnReachedBarColor = attributes
                .getColor(
                        R.styleable.CustomProcessBarView_progress_unreached_color,
                        DEFAULT_COLOR_UNREACHED_COLOR);
        mReachedProgressBarHeight = (int) attributes
                .getDimension(
                        R.styleable.CustomProcessBarView_progress_reached_bar_height,
                        mReachedProgressBarHeight);
        mUnReachedProgressBarHeight = (int) attributes
                .getDimension(
                        R.styleable.CustomProcessBarView_progress_unreached_bar_height,
                        mUnReachedProgressBarHeight);
        mTextOffset = (int) attributes
                .getDimension(
                        R.styleable.CustomProcessBarView_progress_text_offset,
                        mTextOffset);

        int textVisible = attributes
                .getInt(R.styleable.CustomProcessBarView_progress_text_visibility,
                        VISIBLE);
        if (textVisible != VISIBLE) {
            mIfDrawText = false;
        }
        attributes.recycle();
    }

    @Override
    protected synchronized void onDraw(Canvas canvas) {
        canvas.save();
        canvas.translate(getPaddingLeft(), getHeight() / 2);
        boolean noNeedBg = false;
        float radio = getProgress() * 1.0f / getMax();
        float progressPosX = (int) (mRealWidth * radio);
        String text = getProgress() + "%";

        float textWidth = mPaint.measureText(text);
        float textHeight = (mPaint.descent() + mPaint.ascent()) / 2;

        if (progressPosX + textWidth > mRealWidth) {
            progressPosX = mRealWidth - textWidth;
            noNeedBg = true;
        }

        float endX = progressPosX - mTextOffset / 2;
        if (endX > 0) {
            mPaint.setColor(mReachedBarColor);
            mPaint.setStrokeWidth(mReachedProgressBarHeight);
            canvas.drawLine(0, 0, endX, 0, mPaint);
        }
        if (mIfDrawText) {
            mPaint.setColor(mTextColor);
            canvas.drawText(text, progressPosX, -textHeight, mPaint);
        }

        if (!noNeedBg) {
            float start = progressPosX + mTextOffset / 2 + textWidth;
            mPaint.setColor(mUnReachedBarColor);
            mPaint.setStrokeWidth(mUnReachedProgressBarHeight);
            canvas.drawLine(start, 0, mRealWidth, 0, mPaint);
        }

        canvas.restore();

    }

    protected int dp2px(int dpVal) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                dpVal, getResources().getDisplayMetrics());
    }

    protected int sp2px(int spVal) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
                spVal, getResources().getDisplayMetrics());

    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        mRealWidth = w - getPaddingRight() - getPaddingLeft();
    }
}
